Abstract

In this paper, a method with highly sensitive multi-wall carbon nanotubes (MWCNTs) film sensors was put forward to evaluate the health condition of glass fiber-reinforced composite single lap joints in real time. With this method, the single lap joint fracture can be predicted when the resistance change rate reached 1.11% to 5.89% approximately. Meanwhile, for the single lap joints, the reality can be found that the farther distance was from the interface to different layers, the more easily defect might emerge under the force introduced in the interface plane. And the stress in the middle area of the interface for the joint was greater than that in the edge when it was stretched. The results of experiments indicated that the effectiveness of MWCNTs sensors to monitor the health condition of the single lap joints was confirmed.

摘要

本文提出了一种采用高灵敏度多壁碳纳米管（MWCNTs）薄膜传感器实时评估玻璃纤维增​​强复合材料单搭接接头健康状况的方法。采用该方法，当电阻变化率大约达到1.11%~5.89%时，可以预测出单搭接接头断裂。同时，对于单搭接接头，实际可以发现，从界面到不同层的距离越远，在界面平面引入的力下越容易出现缺陷。拉伸时接头界面中间区域的应力大于边缘处的应力。实验结果表明，MWCNTs传感器监测单搭接关节健康状况的有效性得到了证实。